invisible wall in Weyandt's Revenge

There is an invisible wall/collision in Weyandt's Revenge that is wrongly placed. It is in the room after the final drop. when you want to leave it into the treasure room, the opening is much smaller then it should be and the invisable wall is also making a trap point (you need to run back a bit and hug the right wall to get out). It is very annoying and confusing.